Incremental Position Sensors

Optical displacement transducers and optical probes

Optical displacement transducers show their strength in applications as probes for very accurate and reproducible measurements. They meet accuracy classes up to 1 µm (0.001 mm) and therefore measure areas thinner than a human hair (approx. 0.08 mm). The change in displacement is detected by optoelectronic scanning of a glass scale, which delivers precise counting pulses even when the temperature changes. The distance to be measured is divided into equal distance elements (increments), which are then counted. The distance travelled is the sum of the increments from a reference point.

The increments are applied as line grids on a linear scale (glass scale) and scanned optically. An incremental system therefore counts the number of steps between two positions. It can be compared to a clock and a stopwatch: The clock measures absolutely, as it indicates a time in relation to a reference - the stopwatch, on the other hand, measures incrementally, as it indicates how much time has passed between two measuring points since the start of the measurement. The electrical pulses are converted as TTL level, open collector or differential as line driver level.

The application areas of these displacement sensors are very versatile and range from measurement technology for medical and laboratory technology to precision mechanical engineering and robotics. They are suitable, for example, for continuous measurement of material thickness or as precision limit switches. Demanding applications often require product optimization. MEGATRON is your partner with the claim to provide each customer individually with the functionally and economically best result. With high delivery reliability and assured quality products, we focus on long-term partnerships and accompany you throughout the entire lifespan of your application.


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